On Mon, Sep 1, 2008 at 9:55 AM, Vincent Beffara <[EMAIL PROTECTED]> wrote: > >> >So, to return to Sage : it should be quite doable to have one plot3d >> >format be povray source-code, to be compiled separately (or which gets >> >compiled in the background). That's not at all real-time, so I'm not >> >sure it fits the original purpose, but it certainly can produce a movie >> >(in .avi or whatever format) in the end. >> >> It would seem that ray tracing should be a fully parallel task. >> I don't know if povray does this but given the upcoming multicore >> machines this kind of technology might be closer to real time >> than before. Do you know if povray can use multicore? > > I don't know if it does, but if the goal is to do animations, it is > trivial to assign a frame computation per core even if povray doesn't do > it directly, so not much is lost. In fact, Dimensions was computed on a > cluster using standard queuing for the different tasks. > > Now if you want only one image, quoting the povray FAQ: > > # 1.4.3.2 Can POV-Ray use multiple processors? > # > # Short answer: The only way to run POV-Ray on multiple processors is to > # run several copies of POV-Ray. > > (You _can_ run several copies computing different lines of the same > image and merge them in the end, if you really want to squeeze the last > second of computation out of your Core-16-bis-quarto ...) > > > OTOH, I read about almost-real-time raytracing by having the > computations done by the GPU ... But if that is the direction you want > to look into, something like OpenGL might be easier. > > /v > > -- > Vincent Beffara > UMPA - ENS Lyon > 46 Allée d'Italie > 69364 LYON cedex 07 > Tel: 04 72 72 85 25 > Fax: 04 72 72 84 80 >
Hi Vincent, i talked with Etienne Ghys some times ago. It is true that the movie was made with Povray but, i believe, it is only because the person who knew 3d was a regular user of Povray. Today, Blender uses Yafray which is a great ray tracer. I don't consider exporting directly from Sage to Povray to be a great idea. From Sage to Blnder offers much more possibilities. Well, that's IMHO... :-) Philippe --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
